<template>
	<view v-if="goods_info.pics">
		<!-- 轮播图区域 -->
		<swiper :indicator-dots="true" :autoplay="true" :interval="3000" :duration="1000" :circular="true">
			<swiper-item v-for="(item, i) in goods_info.pics" :key="i">
				<image :src="item.pics_big" @click="preview(i)"></image>
			</swiper-item>
		</swiper>
		<!-- 商品信息区域 -->
		<view class="goods-info-box">
			<!-- 商品价格 -->
			<view class="price">￥{{goods_info.goods_price}}</view>
			<!-- 信息主体区域 -->
			<view class="goods-info-body">
				<!-- 商品名称 -->
				<view class="goods-name">{{goods_info.goods_name}}</view>
				<!-- 收藏 -->
				<view class="favi">
					<uni-icons type="star" size="18" color="gray"></uni-icons>
					<text>收藏</text>
				</view>
			</view>
			<!-- 运费 -->
			<view class="yf">快递：免运费</view>
		</view>
		<!-- 商品详情信息 -->
		<rich-text :nodes="goods_info.goods_introduce"></rich-text>
		<!-- 导航按钮区域 -->
		<view class="goods_nav">
			<uni-goods-nav :fill="true" :options="options" :buttonGroup="buttonGroup" @click="onClick"
				@buttonClick="buttonClick" />
		</view>
	</view>
</template>

<script>
	import { mapGetters, mapMutations } from 'vuex'
	export default {
		data() {
			return {
				// 商品详情对象
				// goods_info: null,
				goods_info: {},
				options: [{
					icon: 'shop',
					text: '店铺'
				}, {
					icon: 'cart',
					text: '购物车',
					info: 9
				}],
				buttonGroup: [{
						text: '加入购物车',
						backgroundColor: '#ff0000',
						color: '#fff'
					},
					{
						text: '立即购买',
						backgroundColor: '#ffa200',
						color: '#fff'
					}
				]
			};
		},
		onLoad({
			goods_id
		}) {
			goods_id && this.getGoodsDetail(goods_id)
		},
		computed: {
			// ...mapState('m_cart', ['total'])
			// ...mapState({
			// 	total: state => state.m_cart.total
			// })
			...mapGetters('m_cart', ['total'])
		},
		methods: {
			// 将mutations中的方法映射过来
			...mapMutations('m_cart', ['addToCart']),
			// 定义请求商品详情数据的方法
			async getGoodsDetail(goods_id) {
				const {
					data: res
				} = await uni.$http.get('/api/public/v1/goods/detail', {
					goods_id
				})
				if (res.meta.status !== 200) return uni.$showMsg()

				// 将 goods_introduce 中的图片全部转为块元素，以便能消除图片下面的空白
				// 怎么转？行内样式
				res.message.goods_introduce = res.message.goods_introduce.replace(/<img /g, '<img style="display: block;" ')
					.replace(/\.webp/g, '.jpg')
				// 为 data 中的数据赋值
				this.goods_info = res.message
			},
			// 预览图片的方法
			preview(i) {
				uni.previewImage({
					// 预览时，默认显示图片的索引
					current: i,
					// 所有图片 url 地址的数组
					urls: this.goods_info.pics.map(x => x.pics_big)
				})
			},
			onClick(e) {
				// console.log(e)
				// 出海 Carts
				// 这里使用 index 作为判断条件，因为按钮一旦设置好后，顺序不会发生改变
				if (e.index === 1) {
					// 跳转到购物车页面
					uni.switchTab({
						url: '/pages/cart/cart'
					})
				}
			},
			buttonClick(e) {
				// 点击了加入购物车
				if (e.index === 0) {
					const goods = {
						goods_id: this.goods_info.goods_id,
						goods_name: this.goods_info.goods_name,
						goods_price: this.goods_info.goods_price,
						goods_count: 1,
						goods_small_logo: this.goods_info.goods_small_logo,
						goods_state: true
					}
					// this.$store.commit('m_cart/addToCart', goods)
					this.addToCart(goods)
				}
				// console.log(e)
				// this.options[1].info++
			}
		},
		watch: {
			// total(val) {
			// 	this.options[1].info = val
			// }
			total: {
				handler(val) {
					this.options[1].info = val
				},
				// 立即监听
				immediate: true
			}
		}
	}
</script>

<style lang="scss">
	swiper {
		height: 750rpx;

		image {
			width: 100%;
			height: 100%;
		}
	}

	// 商品信息区域的样式
	.goods-info-box {
		padding: 10px;
		padding-right: 0;

		.price {
			color: #c00000;
			font-size: 18px;
			margin: 10px 0;
		}

		.goods-info-body {
			display: flex;
			justify-content: space-between;

			.goods-name {
				font-size: 13px;
				padding-right: 10px;
			}

			// 收藏区域
			.favi {
				width: 120px;
				font-size: 12px;
				display: flex;
				flex-direction: column;
				justify-content: center;
				align-items: center;
				border-left: 1px solid #efefef;
				color: gray;
			}
		}

		// 运费
		.yf {
			margin: 10px 0;
			font-size: 12px;
			color: gray;
		}
	}

	.goods-detail-container {
		// 给页面外层的容器，添加 50px 的内padding，
		// 防止页面内容被底部的商品导航组件遮盖
		padding-bottom: 50px;
	}

	.goods_nav {
		// 为商品导航组件添加固定定位
		position: fixed;
		bottom: 0;
		left: 0;
		width: 100%;
	}
</style>